US20040119282A1 - Method and apparatus for coupling a conduit to a fitting - Google Patents
Method and apparatus for coupling a conduit to a fitting Download PDFInfo
- Publication number
- US20040119282A1 US20040119282A1 US10/322,995 US32299502A US2004119282A1 US 20040119282 A1 US20040119282 A1 US 20040119282A1 US 32299502 A US32299502 A US 32299502A US 2004119282 A1 US2004119282 A1 US 2004119282A1
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- US
- United States
- Prior art keywords
- fitting
- collar
- conduit
- passageway
- fitting body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
- F16L13/14—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
- F16L13/16—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling the pipe joint consisting of overlapping extremities having mutually co-operating collars
- F16L13/161—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling the pipe joint consisting of overlapping extremities having mutually co-operating collars the pipe or collar being deformed by crimping or rolling
- F16L13/163—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling the pipe joint consisting of overlapping extremities having mutually co-operating collars the pipe or collar being deformed by crimping or rolling one collar being bent over the other
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
- F16L13/14—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
- F16L13/141—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling by crimping or rolling from the outside
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/20—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members
- F16L33/207—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose
- F16L33/2071—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose the sleeve being a separate connecting member
- F16L33/2073—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose the sleeve being a separate connecting member directly connected to the rigid member
- F16L33/2075—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose the sleeve being a separate connecting member directly connected to the rigid member by quick acting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49908—Joining by deforming
- Y10T29/49925—Inward deformation of aperture or hollow body wall
- Y10T29/49927—Hollow body is axially joined cup or tube
Definitions
- This invention relates generally to fittings, and more specifically to methods and apparatus for coupling a conduit to a fitting.
- At least some known conduit fitting assemblies include a collar coupled to an end fitting.
- the end of the conduit end is received within a portion of the collar, and a portion of the end fitting is received within the conduit end. More specifically, the portion of the collar that includes the conduit end is then compressed radially inwardly such that the conduit end is compressed between the end fitting and the collar. When compressed, friction created between the collar and an outer surface of the conduit end, and friction created between an inner surface of the conduit end and the end fitting retains the conduit end within the collar.
- At least some known collars are threadably coupled to the conduit end fitting, while other known collars include an offset that mates with a reduced diameter portion of the end fitting when compressed to secure the collar to the end fitting.
- such conduit fitting assemblies may require an extended length to ensure a secure connection is created between the collar and the conduit end fitting. Accordingly, the cost and overall weight of the conduit fitting assembly may be increased.
- known end fitting assemblies may not include a generally uniform end fitting nipple portion outer diameter, which may increase difficulty of inserting the fitting nipple portion within the conduit end.
- conduit end fitting assemblies include a mandrel that is inserted within a passageway defined in the end fitting to support the end fitting and to prevent partial, or complete, collapse of the passageway.
- a mandrel is a rigid metallic tool that is received within the end fitting.
- a mandrel may be an eutectic compound that is inserted within the end fitting. Mandrels may increase the labor and tooling required to produce such fitting assemblies.
- the mandrel is a eutectic compound, the eutectic compound may contaminate fluid flowing through the fitting assembly.
- a method for coupling a conduit to a fitting includes providing a fitting having a body and a passageway extending through the fitting body, inserting at least a portion of the fitting body within at least a portion of a collar, and compressing at least a portion of the collar around at least a portion of the fitting body such that the fitting body is not internally supported from within the passageway.
- a fitting is provided for a fitting assembly.
- the fitting includes a body extending between a first end and a second end.
- the fitting body is configured to be at least partially received within a collar.
- the collar is configured to be compressed around the portion of the fitting body received within the collar such that the collar is fixedly secured to the fitting.
- the fitting also includes a passageway extending through the body. The passageway is configured to substantially resist radial deformation when the collar is compressed radially around the fitting body such that the fitting body is not internally supported from within the passageway.
- a fitting assembly including a conduit having a body extending between a first end and a second end, and a fitting including a body extending between a first end and a second end.
- the fitting body includes a passageway extending through the fitting body.
- the fitting first end includes a nipple portion.
- the fitting assembly includes a collar having a body extending between a first end and a second end.
- the fitting body nipple portion is at least partially received within the conduit first end.
- the conduit first end is at least partially received within the collar body.
- the collar body is compressed around the conduit first end and a portion of the fitting body such that the conduit first end is compressed between the collar body and at least a portion of the fitting body nipple portion.
- the passageway is configured to substantially resist radial deformation during compression of the collar body and the first conduit end such that the fitting body is not internally supported within the passageway.
- FIG. 1 is a side view of an exemplary end fitting for use with a conduit fitting assembly
- FIG. 2 is a cross-sectional view of an exemplary collar for use with a conduit fitting assembly
- FIG. 3 is a cross-sectional view of a conduit fitting assembly including the end fitting shown in FIG. 1, and the collar shown in FIG. 2;
- FIG. 4 is a side view of an alternative embodiment of an end fitting that may be used with the fitting assembly shown in FIG. 3.
- a conduit may include any apparatus through which a fluid may be conveyed.
- a conduit may include a tube, a pipe, a duct, a flexible hose, and/or a non-flexible hose.
- the above examples are intended as exemplary only, and thus are not intended to limit in any way the definition and/or meaning of the term “conduit”.
- FIG. 1 is a side view of an exemplary end fitting 10 for use with a conduit fitting assembly (not shown in FIG. 1).
- End fitting 10 includes a first end 12 , a second end 14 , a fitting portion 16 , and a nipple portion 18 .
- End fitting 10 also includes a first annular portion 20 having a first diameter 21 , a second annular portion 22 having second diameter 23 , a third annular portion 24 having a third diameter 25 , a fourth annular portion 26 having a fourth diameter 27 , and a fifth annular portion 28 having a fifth diameter 29 .
- fourth diameter 27 is substantially equal to second diameter 23 .
- End fitting 10 has an overall length 30 measured between first end 12 and second end 14 .
- a central axis 32 extends through end fitting 10 from first end 12 to second end 14 .
- a substantially cylindrical passageway 34 extends through end fitting 10 from second end 14 to fitting portion 16 for a length 36 .
- passageway 34 has a substantially constant diameter 38 that is smaller than first diameter 21 , second diameter 23 , third diameter 25 , fourth diameter 27 , and fifth diameter 29 .
- Fitting portion 16 is a distance 40 from end fitting first end 12 , and is configured to couple with a second end fitting (not shown) such that passageway 34 is in coupled fluid communication with a passageway (not shown) extending through the second fitting.
- End fitting first annular portion 20 has a width 42 extending between end fitting second annular portion 22 and fitting portion 16 .
- End fitting second annular portion 22 has a width 44 extending between first annular portion 20 and end fitting third annular portion 24 .
- a groove 47 hereinafter referred to as flange groove 47 , is defined between end fitting second annular portion 22 and third annular portion 24 .
- Nipple portion 18 is adjacent end fitting second end 14 and extends a distance 46 from end fitting second end 14 to end fitting third annular portion 24 . Accordingly, nipple portion 18 includes fourth annular portion 26 and fifth annular portion 28 .
- Nipple fifth annular portion 28 extends a distance 48 from end fitting second end 14 to fourth annular portion 26
- fourth annular portion 26 extends a width 50 between fifth annular portion 28 and third annular portion 24
- End fitting third annular portion 24 has a width 52 extending between end fitting second annular portion 22 and fourth annular portion 26
- Nipple fifth annular portion 28 includes a plurality of projections 54 that extend outwardly therefrom and define nipple fifth diameter 29 . As will be discussed in greater detail below, projections 54 facilitate retaining end fitting nipple portion 18 within a conduit end (not shown in FIG. 1).
- FIG. 2 is a cross-sectional view of an exemplary collar 60 for use with a conduit fitting assembly (not shown in FIG. 2).
- Collar 60 includes a first end 62 , a second end 64 , a flange 66 , a radially inner surface 68 , and a radially outer surface 70 .
- Collar 60 extends a length 72 between collar ends 62 and 64 .
- collar 60 is substantially cylindrical.
- An inner diameter 74 of collar 50 is defined by collar radially inner surface 68
- an outer diameter 76 of collar 60 is defined by collar radially outer surface 70 .
- Collar 60 also includes a central axis 78 that extends through collar length 72 .
- Flange 66 extends generally radially inwardly from collar first end 62 for a length 79 , towards collar second end 64 .
- flange length 79 is smaller than end fitting second annular portion width 44 , such that flange 79 can be received within flange groove 47 .
- flange 66 extends outwardly from collar first end 62 at an angle 80 relative to collar radially inner surface 68 such that flange 66 is obliquely aligned with respect to collar radially inner surface 68 .
- angle 80 is approximately equal to 9.5° relative to radially inner surface 68 .
- angle 80 may be between approximately 9° and 10° relative to radially inner surface 68 .
- Flange 66 includes a radially inner surface 82 and a radially outer surface 84 .
- Flange radially inner surface 82 defines an inner diameter 86 of flange 66 that is larger than end fitting second diameter 23 .
- flange 66 includes a flange gap 90 that is defined by flange radially outer surface 84 and collar radially inner surface 68 , and more specifically, by flange angle 80 .
- FIG. 3 is a cross-sectional view of a conduit fitting assembly 100 including end fitting 10 , collar 60 , and a conduit 102 .
- Conduit 102 includes a first end 104 , a second end (not shown), a radially outer surface 106 , and a liner 108 .
- a central axis 109 extends through conduit 102 between conduit first end 104 and the conduit second end.
- a radially inner surface 110 of conduit liner 108 defines an inner diameter 112 of conduit 102 .
- Conduit liner inner surface 110 also defines a passageway 114 that extends substantially through the length of conduit 102 between conduit first end 104 and the conduit second end.
- Conduit radially outer surface 106 defines an outer diameter 116 of conduit 102 .
- Conduit 102 is received within a portion of collar 60
- end fitting nipple portion 18 is received within a portion of conduit 102 , such that conduit passageway 114 is coupled in fluid communication with end fitting passageway 34 .
- conduit inner diameter 112 is smaller than nipple fourth diameter 27 and nipple fifth diameter 29 .
- conduit outer diameter 116 is smaller than collar inner diameter 74 .
- conduit first end 104 is inserted within a portion of collar 60 such that conduit 102 and collar 60 are substantially concentrically aligned, and such that conduit central axis 109 is substantially co-linearly aligned with collar central axis 78 .
- End fitting nipple portion 18 is then inserted within conduit first end 104 such that flange 66 is at least partially received in flange groove 47 , and such that end fitting 10 is generally concentrically aligned with conduit 102 and collar 60 .
- end fitting central axis 32 is substantially co-linearly aligned with collar central axis 78 and conduit central axis 109 .
- Compressive force is then applied around at least a portion of collar radially outer surface 70 such that conduit 102 is compressed radially inwardly between end fitting nipple portion 18 and collar 60 . More specifically, a portion of conduit 102 is compressed radially inwardly between nipple fifth annular portion 28 and collar radially inner surface 68 , and a portion of conduit 102 is compressed between collar radially inner surface 68 and nipple fourth annular portion 26 .
- Compression of collar 60 also forces flange 66 within flange groove 47 , such that flange radially inner surface 82 contacts an outer surface 118 of end fitting second diameter portion 22 , and such that flange 66 is compressed. Compression of flange 66 causes flange gap 90 to substantially close such that flange radially outer surface 84 contacts collar radially inner surface 68 . Accordingly, when compressed, flange 66 is substantially parallel with collar radially inner surface 68 . In addition, when flange 66 is compressed flange 66 extends a length 120 from collar first end 62 towards collar second end 64 . In the exemplary embodiment, flange length 120 is approximately equal to end fitting second annular portion width 44 , such that flange 66 fits securely within flange groove 47 when compressed.
- conduit radially outer surface 106 includes a wirebraid (not shown) that facilitates retaining conduit first end 104 within collar 60 such that first end 104 is fixedly secured to collar 60 .
- friction between projections 54 and conduit liner inner surface 110 facilitates retaining end fitting nipple portion 18 within conduit first end 104 such that end fitting nipple portion 18 is fixedly secured within conduit first end 104 .
- conduit passageway 114 is coupled in fluid communication with end fitting passageway 34 and is substantially sealed with respect to end fitting passageway 34 , such that fluid does not leak from conduit fitting assembly 100 .
- compression of conduit 102 between fourth annular portion 26 and collar radially inner surface 68 facilitates sealing conduit fitting assembly 100 to facilitate preventing fluid flow and/or leakage between conduit liner inner surface 110 and the radially outer surfaces of fitting nipple portion 18 .
- FIG. 4 is side view of an alternative embodiment of an end fitting 200 that may be used with a conduit fitting assembly, such as conduit fitting assembly 100 (shown in FIG. 3).
- End fitting 200 includes a first end 202 , a second end 204 , a fitting portion 206 , and a nipple portion 208 .
- End fitting 10 also includes a first annular portion 210 having a first diameter 212 , a second annular portion 214 having second diameter 216 , a third, annular portion 218 , and a fourth annular portion 220 having a fourth diameter 222 .
- End fitting 200 has an overall length 224 measured between first end 202 and second end 204 .
- a central axis 226 extends through end fitting 200 from first end 202 to second end 204 .
- a substantially cylindrical passageway 228 extends through end fitting 200 from second end 204 to fitting portion 206 for a length 230 .
- Fitting portion 206 is a distance 232 from end fitting first end 202 , and is configured to couple with a second end fitting (not shown) such that passageway 228 is in coupled fluid communication with a passageway (not shown) extending through the second fitting.
- First annular portion 210 has a width 234 extending between end fitting second annular portion 214 and fitting portion 206 .
- End fitting second annular portion 214 has a width 236 extending between first annular portion 210 and end fitting third annular portion 218 .
- End fitting third annular portion 218 has a width 238 extending between second annular portion 214 and end fitting fourth annular portion 220 .
- End fitting third annular portion 218 has a third-diameter 240 adjacent second annular portion 214 that decreases along third annular portion width 238 as third annular portion 218 approaches fourth annular portion 220 .
- the diameter of third annular portion 218 is substantially equal to fourth diameter 222 at the intersection of third annular portion 218 and fourth annular portion 220 .
- End fitting fourth annular portion 220 extends a distance 240 from third annular portion 218 to end fitting second end 204 .
- End fitting nipple portion 208 is adjacent end fitting second end 204 and extends a distance 242 from end fitting second end 204 to end fitting third annular portion 218 . Accordingly, nipple portion 208 includes fourth annular portion 220 . End fitting nipple portion 208 is configured to be received within a conduit end, as described above in reference to end fitting 10 (shown in FIG. 1) and conduit fitting assembly 100 (shown in FIG. 3). Nipple fourth annular portion 220 includes a plurality of projections 244 that extend outwardly therefrom and define nipple fourth diameter 222 . Projections 244 facilitate retaining end fitting nipple portion 208 within the conduit end.
- Compressive force is applied radially inwardly to a collar (not shown) to secure end fitting 200 to the collar.
- the collar is a substantially right cylinder, and is known as a straight collar.
- the compressive force may cause deformation to at least some known end fittings such that a fluid passageway, such as passageway 228 , within the end fitting may partially collapse, thereby possibly restricting fluid flow through the passageway.
- End fitting 200 includes a minimum thickness 248 between end fitting radially inner wall 229 and second diameter 216 , between end fitting radially inner wall 229 and an outer surface 250 of third annular portion 218 , and between end fitting radially inner wall 229 and fourth diameter 222 .
- a thickness of at least minimum thickness 248 extends along second annular portion fifth length 236 , third annular portion sixth length 238 , and fourth annular portion seventh length 240 .
- minimum thickness 248 provides sufficient strength to support passageway 228 such that passageway 228 substantially resists radial deformation beyond design requirements, and such that end fitting 200 is not supported from within passageway 228 .
- minimum thickness 248 facilitates preventing radial deformation of passageway 228 greater than 0.002 inches.
- thickness 248 facilitates preventing radial deformation of passageway 228 greater than 0.0005 inches.
- minimum thickness 248 facilitates preventing radial deformation of passageway 228 greater than 0.001 inches.
- the above-described conduit fitting assembly is cost-effective and highly reliable for coupling a conduit to a fitting.
- the assembly permits a lightweight and low-cost collar to be precision mated to an end fitting without the use of a threaded connection. More specifically, the assembly allows the use of an end fitting that is shorter, thereby decreasing the assemblies weight and cost, and increasing the amount of conduit that is flexible.
- the assembly may also facilitate coupling a conduit to a fitting without using a mandrel. As a result, the assembly facilitates coupling a conduit to a fitting in a cost-effective and reliable manner.
- conduit fitting assemblies are described above in detail.
- the assemblies are not limited to the specific embodiments described herein, but rather, components of each assembly may be utilized independently and separately from other components described herein.
- Each fitting assembly component can also be used in combination with other fitting assembly components.
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Abstract
A method for coupling a conduit to a fitting. The method includes providing a fitting having a body and a passageway extending through the fitting body, inserting at least a portion of the fitting body within at least a portion of a collar, and compressing at least a portion of the collar around at least a portion of the fitting body such that the fitting body is not internally supported from within the passageway.
Description
- This invention relates generally to fittings, and more specifically to methods and apparatus for coupling a conduit to a fitting.
- At least some known conduit fitting assemblies include a collar coupled to an end fitting. The end of the conduit end is received within a portion of the collar, and a portion of the end fitting is received within the conduit end. More specifically, the portion of the collar that includes the conduit end is then compressed radially inwardly such that the conduit end is compressed between the end fitting and the collar. When compressed, friction created between the collar and an outer surface of the conduit end, and friction created between an inner surface of the conduit end and the end fitting retains the conduit end within the collar.
- At least some known collars are threadably coupled to the conduit end fitting, while other known collars include an offset that mates with a reduced diameter portion of the end fitting when compressed to secure the collar to the end fitting. However, such conduit fitting assemblies may require an extended length to ensure a secure connection is created between the collar and the conduit end fitting. Accordingly, the cost and overall weight of the conduit fitting assembly may be increased. Furthermore, known end fitting assemblies may not include a generally uniform end fitting nipple portion outer diameter, which may increase difficulty of inserting the fitting nipple portion within the conduit end.
- Other known conduit end fitting assemblies include a mandrel that is inserted within a passageway defined in the end fitting to support the end fitting and to prevent partial, or complete, collapse of the passageway. Typically, a mandrel is a rigid metallic tool that is received within the end fitting. However, for complex conduit geometries, a mandrel may be an eutectic compound that is inserted within the end fitting. Mandrels may increase the labor and tooling required to produce such fitting assemblies. In addition, when the mandrel is a eutectic compound, the eutectic compound may contaminate fluid flowing through the fitting assembly.
- A method is provided for coupling a conduit to a fitting. The method includes providing a fitting having a body and a passageway extending through the fitting body, inserting at least a portion of the fitting body within at least a portion of a collar, and compressing at least a portion of the collar around at least a portion of the fitting body such that the fitting body is not internally supported from within the passageway.
- A fitting is provided for a fitting assembly. The fitting includes a body extending between a first end and a second end. The fitting body is configured to be at least partially received within a collar. The collar is configured to be compressed around the portion of the fitting body received within the collar such that the collar is fixedly secured to the fitting. The fitting also includes a passageway extending through the body. The passageway is configured to substantially resist radial deformation when the collar is compressed radially around the fitting body such that the fitting body is not internally supported from within the passageway.
- A fitting assembly is provided including a conduit having a body extending between a first end and a second end, and a fitting including a body extending between a first end and a second end. The fitting body includes a passageway extending through the fitting body. The fitting first end includes a nipple portion. In addition, the fitting assembly includes a collar having a body extending between a first end and a second end. The fitting body nipple portion is at least partially received within the conduit first end. The conduit first end is at least partially received within the collar body. The collar body is compressed around the conduit first end and a portion of the fitting body such that the conduit first end is compressed between the collar body and at least a portion of the fitting body nipple portion. The passageway is configured to substantially resist radial deformation during compression of the collar body and the first conduit end such that the fitting body is not internally supported within the passageway.
- FIG. 1 is a side view of an exemplary end fitting for use with a conduit fitting assembly;
- FIG. 2 is a cross-sectional view of an exemplary collar for use with a conduit fitting assembly;
- FIG. 3 is a cross-sectional view of a conduit fitting assembly including the end fitting shown in FIG. 1, and the collar shown in FIG. 2; and
- FIG. 4 is a side view of an alternative embodiment of an end fitting that may be used with the fitting assembly shown in FIG. 3.
- As used herein, the term “conduit” may include any apparatus through which a fluid may be conveyed. For example, a conduit may include a tube, a pipe, a duct, a flexible hose, and/or a non-flexible hose. The above examples are intended as exemplary only, and thus are not intended to limit in any way the definition and/or meaning of the term “conduit”.
- FIG. 1 is a side view of an exemplary end fitting10 for use with a conduit fitting assembly (not shown in FIG. 1).
End fitting 10 includes afirst end 12, asecond end 14, afitting portion 16, and anipple portion 18.End fitting 10 also includes a firstannular portion 20 having afirst diameter 21, a secondannular portion 22 havingsecond diameter 23, a thirdannular portion 24 having athird diameter 25, a fourth annular portion 26 having afourth diameter 27, and a fifthannular portion 28 having afifth diameter 29. In one embodiment,fourth diameter 27 is substantially equal tosecond diameter 23. -
End fitting 10 has anoverall length 30 measured betweenfirst end 12 andsecond end 14. Acentral axis 32 extends through end fitting 10 fromfirst end 12 tosecond end 14. A substantiallycylindrical passageway 34 extends through end fitting 10 fromsecond end 14 to fittingportion 16 for alength 36. In the exemplary embodiment,passageway 34 has a substantiallyconstant diameter 38 that is smaller thanfirst diameter 21,second diameter 23,third diameter 25,fourth diameter 27, andfifth diameter 29. Fittingportion 16 is adistance 40 from end fittingfirst end 12, and is configured to couple with a second end fitting (not shown) such thatpassageway 34 is in coupled fluid communication with a passageway (not shown) extending through the second fitting. - End fitting first
annular portion 20 has awidth 42 extending between end fitting secondannular portion 22 andfitting portion 16. End fitting secondannular portion 22 has awidth 44 extending between firstannular portion 20 and end fitting thirdannular portion 24. Agroove 47, hereinafter referred to asflange groove 47, is defined between end fitting secondannular portion 22 and thirdannular portion 24. Nippleportion 18 is adjacent end fittingsecond end 14 and extends adistance 46 from end fittingsecond end 14 to end fitting thirdannular portion 24. Accordingly,nipple portion 18 includes fourth annular portion 26 and fifthannular portion 28. Fifthannular portion 28 extends adistance 48 from end fittingsecond end 14 to fourth annular portion 26, and fourth annular portion 26 extends awidth 50 between fifthannular portion 28 and thirdannular portion 24. End fitting thirdannular portion 24 has awidth 52 extending between end fitting secondannular portion 22 and fourth annular portion 26. Nipple fifthannular portion 28 includes a plurality ofprojections 54 that extend outwardly therefrom and define nipplefifth diameter 29. As will be discussed in greater detail below,projections 54 facilitate retaining endfitting nipple portion 18 within a conduit end (not shown in FIG. 1). - FIG. 2 is a cross-sectional view of an
exemplary collar 60 for use with a conduit fitting assembly (not shown in FIG. 2). Collar 60 includes afirst end 62, asecond end 64, aflange 66, a radiallyinner surface 68, and a radiallyouter surface 70. Collar 60 extends alength 72 betweencollar ends collar 60 is substantially cylindrical. Aninner diameter 74 ofcollar 50 is defined by collar radiallyinner surface 68, and anouter diameter 76 ofcollar 60 is defined by collar radiallyouter surface 70. Collar 60 also includes acentral axis 78 that extends throughcollar length 72.Flange 66 extends generally radially inwardly from collarfirst end 62 for alength 79, towards collarsecond end 64. In the exemplary embodiment,flange length 79 is smaller than end fitting secondannular portion width 44, such thatflange 79 can be received withinflange groove 47. Accordingly,flange 66 extends outwardly from collarfirst end 62 at anangle 80 relative to collar radiallyinner surface 68 such thatflange 66 is obliquely aligned with respect to collar radiallyinner surface 68. In one embodiment,angle 80 is approximately equal to 9.5° relative to radiallyinner surface 68. In another embodiment,angle 80 may be between approximately 9° and 10° relative to radiallyinner surface 68. -
Flange 66 includes a radiallyinner surface 82 and a radiallyouter surface 84. Flange radiallyinner surface 82 defines aninner diameter 86 offlange 66 that is larger than end fittingsecond diameter 23. In addition,flange 66 includes aflange gap 90 that is defined by flange radiallyouter surface 84 and collar radiallyinner surface 68, and more specifically, byflange angle 80. - FIG. 3 is a cross-sectional view of a conduit
fitting assembly 100 including end fitting 10,collar 60, and aconduit 102.Conduit 102 includes afirst end 104, a second end (not shown), a radiallyouter surface 106, and aliner 108. Acentral axis 109 extends throughconduit 102 between conduitfirst end 104 and the conduit second end. A radiallyinner surface 110 ofconduit liner 108 defines aninner diameter 112 ofconduit 102. Conduit linerinner surface 110 also defines apassageway 114 that extends substantially through the length ofconduit 102 between conduitfirst end 104 and the conduit second end. Conduit radiallyouter surface 106 defines anouter diameter 116 ofconduit 102.Conduit 102 is received within a portion ofcollar 60, and endfitting nipple portion 18 is received within a portion ofconduit 102, such thatconduit passageway 114 is coupled in fluid communication withend fitting passageway 34. In the exemplary embodiment, conduitinner diameter 112 is smaller than nipplefourth diameter 27 and nipplefifth diameter 29. In addition, in the exemplary embodiment, conduitouter diameter 116 is smaller than collarinner diameter 74. - To assemble conduit
fitting assembly 100, conduitfirst end 104 is inserted within a portion ofcollar 60 such thatconduit 102 andcollar 60 are substantially concentrically aligned, and such that conduitcentral axis 109 is substantially co-linearly aligned with collarcentral axis 78. Endfitting nipple portion 18 is then inserted within conduitfirst end 104 such thatflange 66 is at least partially received inflange groove 47, and such that end fitting 10 is generally concentrically aligned withconduit 102 andcollar 60. More specifically, end fittingcentral axis 32 is substantially co-linearly aligned with collarcentral axis 78 and conduitcentral axis 109. Compressive force is then applied around at least a portion of collar radiallyouter surface 70 such thatconduit 102 is compressed radially inwardly between endfitting nipple portion 18 andcollar 60. More specifically, a portion ofconduit 102 is compressed radially inwardly between nipple fifthannular portion 28 and collar radiallyinner surface 68, and a portion ofconduit 102 is compressed between collar radiallyinner surface 68 and nipple fourth annular portion 26. - Compression of
collar 60 also forcesflange 66 withinflange groove 47, such that flange radiallyinner surface 82 contacts anouter surface 118 of end fittingsecond diameter portion 22, and such thatflange 66 is compressed. Compression offlange 66 causesflange gap 90 to substantially close such that flange radiallyouter surface 84 contacts collar radiallyinner surface 68. Accordingly, when compressed,flange 66 is substantially parallel with collar radiallyinner surface 68. In addition, whenflange 66 is compressedflange 66 extends alength 120 from collarfirst end 62 towards collarsecond end 64. In the exemplary embodiment,flange length 120 is approximately equal to end fitting secondannular portion width 44, such thatflange 66 fits securely withinflange groove 47 when compressed. - Once
collar 60 has been compressed, friction between collar radiallyinner surface 68 and conduit radiallyouter surface 106 facilitates retaining conduitfirst end 104 withincollar 60 such thatfirst end 104 is fixedly secured tocollar 60. In one embodiment, conduit radiallyouter surface 106 includes a wirebraid (not shown) that facilitates retaining conduitfirst end 104 withincollar 60 such thatfirst end 104 is fixedly secured tocollar 60. In addition, friction betweenprojections 54 and conduit linerinner surface 110 facilitates retaining endfitting nipple portion 18 within conduitfirst end 104 such that endfitting nipple portion 18 is fixedly secured within conduitfirst end 104. Furthermore, whencollar 60 has been compressed,flange 66 facilitates retaining a portion of end fitting 10 withincollar 60 such that end fitting 10 is fixedly secured tocollar 60. Once conduit fitting assembly has been assembled,conduit passageway 114 is coupled in fluid communication withend fitting passageway 34 and is substantially sealed with respect to endfitting passageway 34, such that fluid does not leak from conduitfitting assembly 100. More specifically, compression ofconduit 102 between fourth annular portion 26 and collar radiallyinner surface 68 facilitates sealing conduitfitting assembly 100 to facilitate preventing fluid flow and/or leakage between conduit linerinner surface 110 and the radially outer surfaces offitting nipple portion 18. - FIG. 4 is side view of an alternative embodiment of an end fitting200 that may be used with a conduit fitting assembly, such as conduit fitting assembly 100 (shown in FIG. 3). End fitting 200 includes a
first end 202, asecond end 204, afitting portion 206, and anipple portion 208. End fitting 10 also includes a firstannular portion 210 having afirst diameter 212, a secondannular portion 214 havingsecond diameter 216, a third,annular portion 218, and a fourthannular portion 220 having afourth diameter 222. - End fitting200 has an
overall length 224 measured betweenfirst end 202 andsecond end 204. Acentral axis 226 extends through end fitting 200 fromfirst end 202 tosecond end 204. A substantiallycylindrical passageway 228 extends through end fitting 200 fromsecond end 204 tofitting portion 206 for alength 230. Fittingportion 206 is adistance 232 from end fittingfirst end 202, and is configured to couple with a second end fitting (not shown) such thatpassageway 228 is in coupled fluid communication with a passageway (not shown) extending through the second fitting. - First
annular portion 210 has awidth 234 extending between end fitting secondannular portion 214 andfitting portion 206. End fitting secondannular portion 214 has awidth 236 extending between firstannular portion 210 and end fitting thirdannular portion 218. End fitting thirdannular portion 218 has awidth 238 extending between secondannular portion 214 and end fitting fourthannular portion 220. End fitting thirdannular portion 218 has a third-diameter 240 adjacent secondannular portion 214 that decreases along thirdannular portion width 238 as thirdannular portion 218 approaches fourthannular portion 220. The diameter of thirdannular portion 218 is substantially equal tofourth diameter 222 at the intersection of thirdannular portion 218 and fourthannular portion 220. End fitting fourthannular portion 220 extends adistance 240 from thirdannular portion 218 to end fittingsecond end 204. - End
fitting nipple portion 208 is adjacent end fittingsecond end 204 and extends adistance 242 from end fittingsecond end 204 to end fitting thirdannular portion 218. Accordingly,nipple portion 208 includes fourthannular portion 220. Endfitting nipple portion 208 is configured to be received within a conduit end, as described above in reference to end fitting 10 (shown in FIG. 1) and conduit fitting assembly 100 (shown in FIG. 3). Nipple fourthannular portion 220 includes a plurality ofprojections 244 that extend outwardly therefrom and define nipplefourth diameter 222.Projections 244 facilitate retaining endfitting nipple portion 208 within the conduit end. - Compressive force is applied radially inwardly to a collar (not shown) to secure end fitting200 to the collar. Unlike collar 60 (shown in FIG. 2) the collar is a substantially right cylinder, and is known as a straight collar. The compressive force may cause deformation to at least some known end fittings such that a fluid passageway, such as
passageway 228, within the end fitting may partially collapse, thereby possibly restricting fluid flow through the passageway. End fitting 200 includes aminimum thickness 248 between end fitting radiallyinner wall 229 andsecond diameter 216, between end fitting radiallyinner wall 229 and anouter surface 250 of thirdannular portion 218, and between end fitting radiallyinner wall 229 andfourth diameter 222. More specifically, a thickness of at leastminimum thickness 248 extends along second annular portionfifth length 236, third annular portionsixth length 238, and fourth annular portionseventh length 240. When compressive force is applied radially inwardly along second annular portionfifth length 236, third annular portionsixth length 238, and fourth annular portionseventh length 240,minimum thickness 248 provides sufficient strength to supportpassageway 228 such thatpassageway 228 substantially resists radial deformation beyond design requirements, and such that end fitting 200 is not supported from withinpassageway 228. In addition, in oneembodiment minimum thickness 248 facilitates preventing radial deformation ofpassageway 228 greater than 0.002 inches. In another embodiment,thickness 248 facilitates preventing radial deformation ofpassageway 228 greater than 0.0005 inches. In yet another embodiment,minimum thickness 248 facilitates preventing radial deformation ofpassageway 228 greater than 0.001 inches. - The above-described conduit fitting assembly is cost-effective and highly reliable for coupling a conduit to a fitting. The assembly permits a lightweight and low-cost collar to be precision mated to an end fitting without the use of a threaded connection. More specifically, the assembly allows the use of an end fitting that is shorter, thereby decreasing the assemblies weight and cost, and increasing the amount of conduit that is flexible. The assembly may also facilitate coupling a conduit to a fitting without using a mandrel. As a result, the assembly facilitates coupling a conduit to a fitting in a cost-effective and reliable manner.
- Exemplary embodiments of conduit fitting assemblies are described above in detail. The assemblies are not limited to the specific embodiments described herein, but rather, components of each assembly may be utilized independently and separately from other components described herein. Each fitting assembly component can also be used in combination with other fitting assembly components.
- While the invention has been described in terms of various specific embodiments, those skilled in the art will recognize that the invention can be practiced with modification within the spirit and scope of the claims.
Claims (20)
1. A method for coupling a conduit to a fitting, said method comprising:
providing a fitting having a body and a passageway extending through the fitting body;
inserting at least a portion of the fitting body within at least a portion of a collar; and
compressing at least a portion of the collar around at least a portion of the fitting body such that the fitting body is not internally supported from within the passageway.
2. A method in accordance with claim 1 wherein inserting at least a portion of the fitting body within at least a portion of a collar comprises:
inserting a portion of a conduit within at least a portion of the collar; and
inserting at least a portion of the fitting within the portion of the conduit received within the collar.
3. A method in accordance with claim 1 wherein the collar is substantially cylindrical, compressing at least a portion of the collar around at least a portion of the fitting body comprises compressing the collar radially inwardly around at least a portion of the fitting body.
4. A method in accordance with claim 1 wherein compressing at least a portion of the collar around at least a portion of the fitting body comprises compressing a portion of a conduit between the collar and the fitting such that the conduit is fixedly secured to the collar and the fitting.
5. A method in accordance with claim 1 wherein providing a fitting having a body and a passageway extending through the fitting body comprises providing a fitting body including a passageway defined therein that substantially resists radial deformation when the collar is compressed radially inwardly around the fitting body.
6. A method in accordance with claim 5 wherein providing a fitting body including a passageway defined therein further comprises providing a fitting body including a sidewall defining the passageway that has a minimum thickness that is substantially constant throughout a length of the body.
7. A method in accordance with claim 1 wherein compressing at least a portion of the collar around at least a portion of the fitting body comprises compressing at least a portion of the collar around at least a portion of the fitting body without inserting a mandrel into the passageway.
8. A method in accordance with claim 1 wherein compressing at least a portion of the collar around at least a portion of the fitting body comprises compressing at least a portion of the collar around at least a portion of the fitting body without radially deforming the dimensions of the passageway greater than 0.002 inches.
9. A method in accordance with claim 1 wherein compressing at least a portion of the collar around at least a portion of the fitting body comprises compressing at least a portion of the collar around at least a portion of the fitting body without radially deforming the dimensions of the passageway greater than 0.001 inches.
10. A method in accordance with claim 1 wherein compressing at least a portion of the collar around at least a portion of the fitting body comprises compressing at least a portion of the collar around at least a portion of the fitting body without radially deforming the dimensions of the passageway greater than 0.0005 inches.
11. A fitting for a fitting assembly, said fitting comprising:
a body extending between a first end and a second end, said fitting body configured to be at least partially received within a collar, the collar is configured to be compressed around said portion of said fitting body received within the collar such that the collar is fixedly secured to said fitting;
a passageway extending through said body, said passageway configured to substantially resist radial deformation when the collar is compressed radially around said fitting body such that the fitting body is not internally supported from within said passageway.
12. A fitting in accordance with claim 11 wherein said passageway configured to resist radial deformation greater than 0.002 inches when the collar is compressed radially around said fitting body.
13. A fitting in accordance with claim 11 wherein said passageway configured to resist radial deformation greater than 0.0005 inches when the collar is compressed radially around said fitting body.
14. A fitting in accordance with claim 11 wherein said passageway configured to resist radial deformation greater than 0.001 inches when the collar is compressed radially around said fitting body.
15. A fitting in accordance claim 11 wherein said fitting body comprises a sidewall defining said passageway, said sidewall comprises a thickness that is substantially constant along a length of said portion of said fitting body received within the collar.
16. A fitting assembly comprising:
a conduit comprising a body extending between a first end and a second end;
a fitting comprising a body extending between a first end and a second end, and comprising a passageway extending through said fitting body, said fitting first end comprising a nipple portion;
a collar comprising a body extending between a first end and a second end, said fitting body nipple portion at least partially received within said conduit first end, said conduit first end at least partially received within said collar body, said collar body compressed around said conduit first end and a portion of said fitting body such that said conduit first end compressed between said collar body and at least a portion of said fitting body nipple portion, said passageway configured to substantially resist radial deformation during compression of said collar body and said first conduit end such that said fitting body is not internally supported within said passageway.
17. A fitting assembly in accordance with claim 16 wherein said conduit comprises a passageway extending through said conduit body, said conduit passageway coupled in fluid communication with said fitting passageway.
18. A fitting assembly in accordance with claim 16 wherein said conduit first end compressed between said collar body and said fitting nipple portion to facilitate preventing fluid flow between a radially inner surface of said conduit end and a radially outer surface of said fitting nipple portion.
19. A fitting assembly in accordance with claim 16 wherein said passageway configured to resist radial deformation greater than at least one of 0.001, 0.002 inches, and 0.0005 inches during compression of said collar body and said first conduit end such that said fitting body is not internally supported within said passageway.
20. A fitting assembly in accordance claim 16 wherein said fitting body comprises a sidewall defining said passageway, said sidewall comprises a thickness that is substantially constant along a length of said portion of said fitting body compressed by said collar.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/322,995 US7316426B2 (en) | 2002-12-18 | 2002-12-18 | Method and apparatus for coupling a conduit to a fitting |
US11/944,101 US7694405B2 (en) | 2002-12-18 | 2007-11-21 | Method for coupling a conduit to a fitting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/322,995 US7316426B2 (en) | 2002-12-18 | 2002-12-18 | Method and apparatus for coupling a conduit to a fitting |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/944,101 Division US7694405B2 (en) | 2002-12-18 | 2007-11-21 | Method for coupling a conduit to a fitting |
Publications (2)
Publication Number | Publication Date |
---|---|
US20040119282A1 true US20040119282A1 (en) | 2004-06-24 |
US7316426B2 US7316426B2 (en) | 2008-01-08 |
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Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/322,995 Expired - Fee Related US7316426B2 (en) | 2002-12-18 | 2002-12-18 | Method and apparatus for coupling a conduit to a fitting |
US11/944,101 Expired - Fee Related US7694405B2 (en) | 2002-12-18 | 2007-11-21 | Method for coupling a conduit to a fitting |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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US11/944,101 Expired - Fee Related US7694405B2 (en) | 2002-12-18 | 2007-11-21 | Method for coupling a conduit to a fitting |
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US (2) | US7316426B2 (en) |
Cited By (1)
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US20070006634A1 (en) * | 2005-06-28 | 2007-01-11 | Mnp Corporation | Crimped tube coupling and a crimping apparatus for making a crimped tube coupling |
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US9718177B1 (en) * | 2014-06-26 | 2017-08-01 | Charles Bell | Gasket removal and insertion tools for refrigeration hoses |
US11788625B2 (en) | 2020-05-27 | 2023-10-17 | Hoffman Enclosures, Inc. | Hygienic hole seal |
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Also Published As
Publication number | Publication date |
---|---|
US7316426B2 (en) | 2008-01-08 |
US20080067812A1 (en) | 2008-03-20 |
US7694405B2 (en) | 2010-04-13 |
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